3v4l.org

run code in 500+ PHP versions simultaneously
<?php $f = 'var_dump'; call_user_func($f, 1); call_user_func_array($f, [1]); $f(1);
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
int(1) int(1) int(1)
preferences:
69.78 ms | 1097 KiB | 4 Q